Re: kern/31507: getcwd returns ERANGE after directory move across null mount

[Simon Burge <simonb%NetBSD.org@localhost>]

With netbsd-4 from October 26 2007, the same test just traps/panics.
A backtrace from core dump doesn't show anything useful really (stack
corruption?):

  (gdb) bt
  #0  0xc04ef80a in cpu_reboot (howto=0, bootstr=0x0)
      at ./sys/arch/i386/i386/machdep.c:896
  #1  0xc04571bb in panic (fmt=0x0) at ./sys/kern/subr_prf.c:246
  #2  0xc04f9f5f in trap (frame=0xd13ea754) at ./sys/arch/i386/i386/trap.c:339
  #3  0xc010b239 in calltrap ()
  #4  0xd13ea754 in ?? ()
  #5  0xd13e0010 in ?? ()
  #6  0xd13e0030 in ?? ()
  #7  0xc0a30010 in playstats ()
  #8  0x00000010 in ?? ()
  #9  0x00000002 in ?? ()
  #10 0x00000002 in ?? ()
  #11 0xd13ea79c in ?? ()
  #12 0x00000004 in ?? ()
  #13 0x00000000 in ?? ()